Why would they offer to discount one or more of the movie channels when they are already part of the package anyway? It's not an option for me to drop one or the other movie channel with Premier. I wish they would offer to discount one or more of the DVRs or free HD for a year or more, etc. I guess I'll never know until I ask.
The why and what of discounts is a real crap shoot. For all the posts talking about the official line, it really isn't that at all. It depends on your account. What level of programming, how long you've been with them, what unpublished promos are available when you call, the mood of the CSR, your approach to them and then there's the magic 8 ball!
I'm still under contract and recently called to drop from Premier to Xtra with no premiums as my bill had gotten a bit out of hand. When the dust settled after the call, the bill went down to about $8 more than Xtra w/no Premiums and I kept Premier. It is a mix of different discounts with varying lengths of time up to 6 months.
There are lots of reports of the same for most that have called to drop from Premier, not at all uncommon.
But as with all discounts, YMMV!